Electronic Expansion Valve - How it works ETS 5M HVAC
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Date: 2023-11-17
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Comments and reviews: 29
Libturds
You have a slight error in your schematic - the refrigerant always enters the condenser from the top, not the bottom, that way the gas can stay on top and as it cools into liquid and the liquid gets pushed to the bottom. And then the liquid enters the expansion valve and the evaporator from the bottom, not the top as you pictured it, that way as it warms up turns into gas the gas can escape from the top leaving most of the liquid on the bottom of the coil
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You have a slight error in your schematic - the refrigerant always enters the condenser from the top, not the bottom, that way the gas can stay on top and as it cools into liquid and the liquid gets pushed to the bottom. And then the liquid enters the expansion valve and the evaporator from the bottom, not the top as you pictured it, that way as it warms up turns into gas the gas can escape from the top leaving most of the liquid on the bottom of the coil
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The
Does anyone know of an electronic expansion valve that is made for ultra low temperature Chillers? I used a Sporlan but the superheat controller would fault out if my suction pressure drop below zero PSI or if my suction line temperature dropped below -59 degrees F. After it faulted the expansion valve would close completely when I ran the controller in manual mode I was able to fine-tune the EEV to 25% open and was able to achieve -85 degree fluid temp
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Does anyone know of an electronic expansion valve that is made for ultra low temperature Chillers? I used a Sporlan but the superheat controller would fault out if my suction pressure drop below zero PSI or if my suction line temperature dropped below -59 degrees F. After it faulted the expansion valve would close completely when I ran the controller in manual mode I was able to fine-tune the EEV to 25% open and was able to achieve -85 degree fluid temp
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why
Brother gave a video covering the entire activities of the flip flop circuit. I'm suffering a lot from it. If you help me, I will benefit a lot. I don't understand which lamp will light up first if you use current in flip flop circuit first. please present this a little nicely. Good luck to you!
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Brother gave a video covering the entire activities of the flip flop circuit. I'm suffering a lot from it. If you help me, I will benefit a lot. I don't understand which lamp will light up first if you use current in flip flop circuit first. please present this a little nicely. Good luck to you!
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Imran
M having problem in this type of eev.
In stopped unit eev are internal leaking which cause sweating on panel body.
Even after replacing whole expansion valve still same issue.
It's a vrf system where some indoors are working and those stopped are getting dew on the panel grill body
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M having problem in this type of eev.
In stopped unit eev are internal leaking which cause sweating on panel body.
Even after replacing whole expansion valve still same issue.
It's a vrf system where some indoors are working and those stopped are getting dew on the panel grill body
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RoadRashSpirit
Have I understoof this correctly? The target super heat is stored in the PID/controller, the evaporator valve will increase or decrease the flow and hence pressure to match this stored value? Or is the super heat value simply the error and should always return to 0?
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Have I understoof this correctly? The target super heat is stored in the PID/controller, the evaporator valve will increase or decrease the flow and hence pressure to match this stored value? Or is the super heat value simply the error and should always return to 0?
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Joao
Nice video, thanks! Nevertheless, I would like to mention a point: the expansion process in a refrigeration cycle is not like a spray of a liquid. While the expansion creates a mixture of liquid and vapor, the spray doesnt form any vapor and it is just a mechanical process.
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Nice video, thanks! Nevertheless, I would like to mention a point: the expansion process in a refrigeration cycle is not like a spray of a liquid. While the expansion creates a mixture of liquid and vapor, the spray doesnt form any vapor and it is just a mechanical process.
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A.
Great Video! But can this also let the compressor be always operating and reducing its lifetime? instead of installing a variable speed compressor that reduces speed and operating cost. How we can combine these two points (reducing flow from the valve or from the compressor.
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Great Video! But can this also let the compressor be always operating and reducing its lifetime? instead of installing a variable speed compressor that reduces speed and operating cost. How we can combine these two points (reducing flow from the valve or from the compressor.
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Freezing
I have been destroyed and open this E, E, V. Then i sow how it works, open close small hole by an elctronic motor controlled by mother bord with sensors and i changed it by cappilpery tube and deleted the elctronic board, cause its impossible to diagnostic.
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I have been destroyed and open this E, E, V. Then i sow how it works, open close small hole by an elctronic motor controlled by mother bord with sensors and i changed it by cappilpery tube and deleted the elctronic board, cause its impossible to diagnostic.
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Mike
Once again, you've presented material in a video that's easy to understand by giving the viewer that OOOHHHH or AAAAHHHH moment! Obviously this new valve's technology will allow a much more finite adjustment of freon for a more constant temperature. I LIKE IT!
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Once again, you've presented material in a video that's easy to understand by giving the viewer that OOOHHHH or AAAAHHHH moment! Obviously this new valve's technology will allow a much more finite adjustment of freon for a more constant temperature. I LIKE IT!
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Nicolaie
Hi Paul, congratulation for this so awesome animation. Can you please share wich tools do you use to create such animation. I would like to use such tools to create something similar but for human anatomical animations. Thank you in advance for advices!
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Hi Paul, congratulation for this so awesome animation. Can you please share wich tools do you use to create such animation. I would like to use such tools to create something similar but for human anatomical animations. Thank you in advance for advices!
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Garrith
Popped up on my homepage, curious to see how an expansion valve works, and what an amazing video. I love videos like these, as you feel your skill level increase after watching. Just another thing in your toolbox for when and if you come across it.
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Popped up on my homepage, curious to see how an expansion valve works, and what an amazing video. I love videos like these, as you feel your skill level increase after watching. Just another thing in your toolbox for when and if you come across it.
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Delrey-P
this page has taught me so much and given me a tonne of confidence with my role. I thought that a change of career into fridge/hvac would've been a difficult one and it looked daunting as hell at first but you've helped massively. Big thank you.
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this page has taught me so much and given me a tonne of confidence with my role. I thought that a change of career into fridge/hvac would've been a difficult one and it looked daunting as hell at first but you've helped massively. Big thank you.
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Gregory
Do expansion valves unload the compressor by shutting down refrigerant flow under low load conditions? All the high SEER conditioners have them, but I'm trying to understand why an expansion valve is better than a fixed orifice metering device.
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Do expansion valves unload the compressor by shutting down refrigerant flow under low load conditions? All the high SEER conditioners have them, but I'm trying to understand why an expansion valve is better than a fixed orifice metering device.
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Power
Why not use a fixed size expansion valve with a variable speed compressor? BLDC / PMSM motors with controllers are almost commodities at this stage and can offer greater efficiency than traditional induction motors.
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Why not use a fixed size expansion valve with a variable speed compressor? BLDC / PMSM motors with controllers are almost commodities at this stage and can offer greater efficiency than traditional induction motors.
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Bjorn
The controller has no way to know what the absolute linear position and range of the valve is, so during first startup there's a chance it's totally off the mark and possibly damaging other components?
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The controller has no way to know what the absolute linear position and range of the valve is, so during first startup there's a chance it's totally off the mark and possibly damaging other components?
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Love2HVAC
Great video! Would you be able to do one on the Automatic expansion valve, AXV AEV also known as the Constant pressure expansion valve. I have found very little animation on this one. Thank you
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Great video! Would you be able to do one on the Automatic expansion valve, AXV AEV also known as the Constant pressure expansion valve. I have found very little animation on this one. Thank you
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Toyin
Thank you for this video.
I am reading the Refrigeration and Air conditioning Technology(9th edition) and this video explained everything on Electronic Expansion Valve in visual and simple way.
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Thank you for this video.
I am reading the Refrigeration and Air conditioning Technology(9th edition) and this video explained everything on Electronic Expansion Valve in visual and simple way.
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Nikhil
I worked on a system in which the expansion valve was a simple solenoid valve. It was constantly opened and closed by a PLC according to temperature readings.
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I worked on a system in which the expansion valve was a simple solenoid valve. It was constantly opened and closed by a PLC according to temperature readings.
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pmailkeey
3: 11 Bike pump gets hotter as it compresses air to force into the tyre.
Good job it does really - as otherwise your car engine wouldn't work.
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3: 11 Bike pump gets hotter as it compresses air to force into the tyre.
Good job it does really - as otherwise your car engine wouldn't work.
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Jafar
We definitely don't adjust the txv on every service call. And personally I don't like those electronic expansion valves. Txvs all the way!
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We definitely don't adjust the txv on every service call. And personally I don't like those electronic expansion valves. Txvs all the way!
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Amy
High, is it possible to see the permanent magnet position from the outside? I try a compas but it works only for a few steps.
Gr Ron
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High, is it possible to see the permanent magnet position from the outside? I try a compas but it works only for a few steps.
Gr Ron
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J.
This is the pickiest of nit picks, but R410A's color scheme is pink, and the refrigerant it replaced, R22, is the green you've depicted.
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This is the pickiest of nit picks, but R410A's color scheme is pink, and the refrigerant it replaced, R22, is the green you've depicted.
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jonte
ive seen alot of termostatic expansion valves that have failed as an hvac technician but never have i seen an EEV to this day fail
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ive seen alot of termostatic expansion valves that have failed as an hvac technician but never have i seen an EEV to this day fail
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zkal
06: 20 I believe there is a wrong explanation because when the superheat is too high the valve should open and vise versa.
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06: 20 I believe there is a wrong explanation because when the superheat is too high the valve should open and vise versa.
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Mehdi
If eev is regulating the flow of refrigerant then how we regulate the compressor discharge pressure kindly make it clear.
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If eev is regulating the flow of refrigerant then how we regulate the compressor discharge pressure kindly make it clear.
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F165
Another guy not telling people the truth. The evaporator doesnt remove heat from the house and bring it to the condenser.
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Another guy not telling people the truth. The evaporator doesnt remove heat from the house and bring it to the condenser.
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Ralph
Can this new electronic expansion valve be used on a existing home a/c unit in place of a mechanical expansion valve?
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Can this new electronic expansion valve be used on a existing home a/c unit in place of a mechanical expansion valve?
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shuaib
please could you also make a video on gasoline generator for us, thanks so much we appreciate and love your efforts
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please could you also make a video on gasoline generator for us, thanks so much we appreciate and love your efforts
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Ralph
This has been one of the best explanation of a expansion valve I seen in the 45 years I been in the HVAC field.
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This has been one of the best explanation of a expansion valve I seen in the 45 years I been in the HVAC field.
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